Optics: measuring and testing – For optical fiber or waveguide inspection
Patent
1998-11-27
2000-01-25
Evans, F. L.
Optics: measuring and testing
For optical fiber or waveguide inspection
356402, 356407, G01J 350, G01N 2125
Patent
active
060183853
ABSTRACT:
A measuring system for registering reflectances on printed products, the measuring system having at least one illumination channel for producing a scanning spot at a point on a measurement field on the printed material. The system includes scanning channels for registering the reflectances of the spot from the printed material. The measuring system moves relative to the printed material. Measuring devices supplying ink density and spectral, preferably colorimetric, measured values are combined with one another without additional outlay in terms of construction. The combination of the measuring principles (density and color) are optimally adapted to the task of a measuring strips on the printed material scanned in the longitudinal direction. The measuring system has a densitometer that produces a scanning spot on the printed material, and a spectrophotometer that produces a further scanning spot on the printed material. The densitometer and the spectrophotometer are arranged one behind the other in the measuring head. The scanning spot of the densitometer and the scanning spot of the spectrophotometer are spaced apart from each other by a distance determined by the speed of the measuring system in the scanning direction and by the computational speed of the evaluation electronics, which are connected downstream of the densitometer and the spectrophotometer. The measured values from the densitometer may trigger the measurements and/or evaluations of the measured values obtained by the spectrophotometer.
REFERENCES:
patent: 4806002 (1989-02-01), Simeth et al.
patent: 5141323 (1992-08-01), Kipphan et al.
patent: 5182721 (1993-01-01), Kipphan et al.
Lampersberger Franz
Rakitsch Peter
Six Hans Joachim
Tutsch Rainer
Wendt Karsten
Evans F. L.
MAN Roland Druckmaschinen AG
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